/*
 * Copyright (c) 2008, Jochen Mader, Tareq Doufish, Andreas Blochberger
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 * - Redistributions of source code must retain the above copyright notice, 
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice, 
 *   this list of conditions and the following disclaimer in the documentation 
 *   and/or other materials provided with the distribution.
 * - Neither the name of Monklypse nor the names of its contributors may be 
 *   used to endorse or promote products derived from this software without 
 *   specific prior written permission.
 *   
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *  POSSIBILITY OF SUCH DAMAGE.
 */
package org.monklypse.core;

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;

import com.jme.util.GameTaskQueue;

/**
 * Collection of helpers.
 * 
 * @author Jochen Mader - jochen@pramari.com - Sep 10, 2008
 * 
 */
public class Helpers {

	/**
	 * This method blocks until the future has returned.
	 * 
	 * @param callable
	 *            the callable to be executed
	 */
	public static void waitOnCallabel(Callable<Object> callable,
			GameTaskQueue queue) {
		Thread thread = new Thread(new TestRunnable(queue.enqueue(callable)));
		thread.start();
		try {
			thread.join();
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
	}

	/**
	 * This runnable is used to wait for a future to return.
	 * 
	 * 
	 * @author Jochen Mader Feb 1, 2008
	 * @tags
	 * 
	 */
	private static class TestRunnable implements Runnable {
		/**
		 * The future to wait on.
		 */
		private Future<Object> future;

		/**
		 * Constructor.
		 * 
		 * @param future
		 *            the future to wait for
		 */
		public TestRunnable(Future<Object> future) {
			this.future = future;
		}

		/*
		 * (non-Javadoc)
		 * 
		 * @see java.lang.Runnable#run()
		 */
		public void run() {
			try {
				future.get();
			} catch (InterruptedException e) {
				e.printStackTrace();
			} catch (ExecutionException e) {
				e.printStackTrace();
			}
		}

	}
}
